Tube retainers



FIG. 1 is a top perspective view of a tube retainer showing our design;

FIG. 2 is a front elevational view thereof, with the rear elevationalview being a mirror image thereof;

FIG. 3 is a right elevational view thereof, with the left elevationalview being a mirror image thereof;

FIG. 4 is a top plan view thereof; and,

FIG. 5 is a bottom plan view.

The broken lines in the figures illustrate unclaimed portions of thetube retainer and form no part of the claimed design.

CLAIM The ornamental design for tube retainers, as shown and described.